SLEM 5 with Unified Extensible Firmware Interface (UEFI) implemented must require authentication upon booting into single-user mode and maintenance.

An XCCDF Rule

Description

If the system allows a user to boot into single-user or maintenance mode without authentication, any user that invokes single-user or maintenance mode is granted privileged access to all system information.

ID: SV-261268r996298_rule
Version: SLEM-05-212015
Severity: High
References: CCI-000213
Updated: 5 days ago

Remediation Templates

Note: If the system does not use UEFI, this requirement is not applicable.

Configure SLEM 5 to encrypt the boot password.

Generate an encrypted GRUB bootloader password for root with the following command:
     > grub2-mkpasswd-pbkdf2
     Enter Password:
     Reenter Password:
     PBKDF2 hash of your password is grub.pbkdf2.sha512.10000.03255F190F0E2F7B4F0D1C3216012309162F022A7A636771

Using the hash from the output, modify the "/etc/grub.d/40_custom" file and add the following two lines to add a boot password for the root entry:

     set superusers="rooty"
     password_pbkdf2 root grub.pbkdf2.sha512.03255F190F0E2F7B4F0D1C3216012309162F022A7A636771

Generate an updated "grub.conf" file with the new password using the following commands:

     > sudo grub2-mkconfig --output=/tmp/grub2.cfg

     > sudo mv /tmp/grub2.cfg /boot/efi/EFI/BOOT/grub.cfg

SLEM 5 with Unified Extensible Firmware Interface (UEFI) implemented must require authentication upon booting into single-user mode and maintenance.

Description

Remediation Templates

A Manual Procedure